4.常见问题

启动失败

查看日志

docker logs -f -t --tail 20 nginx

操作无权限

aa-remove-unknown

修改容器端口映射

1. 编辑容器配置文件 /var/lib/docker/containers/{containersid}/hostconfig.json

root@zouni:/var/lib/docker/containers/572a9b8574dcc5077c7c4ec139e4e044e80696f78d1e658d0e735e183944cd28# ls
572a9b8574dcc5077c7c4ec139e4e044e80696f78d1e658d0e735e183944cd28-json.log  hostconfig.json  mounts
checkpoints                                                                hostname         resolv.conf
config.v2.json                                                             hosts            resolv.conf.hash

！！先关掉docker,然后修改其中绑定的端口,重启docker就可以了

,"PortBindings":{"5432/tcp":[{"HostIp":"","HostPort":"8099"}]}

端口映射，本地可以访问，远程不能访问！！！

1. 检查防火墙

#查看防火墙状态，运行中
root@zouni:/# firewall-cmd --state
running
#查看放开的端口，开放这几个端口，8088为放开
root@zouni:/# firewall-cmd --list-all
You're performing an operation over default zone ('public'),
but your connections/interfaces are in zone 'docker' (see --get-active-zones)
You most likely need to use --zone=docker option.

public
  target: default
  icmp-block-inversion: no
  interfaces:
  sources:
  services: dhcpv6-client ssh
  ports: 8088/tcp 8099/tcp 5432/tcp 443/tcp  # 开放的端口列表
  protocols:
  forward: yes
  masquerade: no
  forward-ports:
  source-ports:
  icmp-blocks:
  rich rules:

1. 检查ip转发

root@zouni:/# sysctl net.ipv4.ip_forward
net.ipv4.ip_forward = 1   # 正常 = 1

1. 检查docker 网卡设置

docker容器启动后外部无法连接
		1第一种
			sudo service docker stop
			sudo ip link set dev docker0 down            %关闭docker虚拟网卡
			sudo brctl delbr docker0
			sudo iptables -t nat -F POSTROUTING
			sudo brctl addbr docker0
			sudo ip addr add 172.16.10.1/24 dev docker0
			sudo ip link set dev docker0 up 				%开启docker虚拟网卡
			systemctl  restart  docker
			brctl命令需要安装： yum install -y bridge-utils
			
		2.第二种
			systemctl stop docker
			ifconfig docker0 down
			brctl delbr docker0
			systemctl start docker
# 原文链接：https://blog.csdn.net/CSDN877425287/article/details/106909673